Furnace-grate.



No. 664.704. Patented Doc. 25, |900.

c.A E. wYmANf FURNCE GRATE..

(Appxicniun and nu. 16,1899.) (lo I odel.) 3 Shoots-Sheet l.

No. 664,704. Patented Dec. 25 |900. C. E. WYMAN.

FURNACE GRATE.

/Applcation filed Jau. 16, 1899.

(No Modal.) 3 Sheets-Sheet 2.

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No. 664,704. Patented Dec. 25, |900. C. E. WYMAN.

FURNACE GRATE.

Appl c nfilda'n 16 1899) 3 Sheets-Sheet 3.

(No Model.)

UNITED STATES PATENT OFFICE.

CHARLES E. WYMAN, OF CLEVELAND, OHIO.

FU RNACE-G RATE.

SPECIFICATION forming part'of Letters Patent No. 664,704. dated December25, 1900.

Application filed January 16, 1899. Serial No. 702,317. (No model.)

Z0 @ZZ whom it may concern:

Be it known that I, CHARLES E. WYMAN, a citizen of the United States,and a resident of Cleveland, county of Cuyahoga, State of Ohio, haveinvented certain new and useful Improvements in Furnace-Crates, of whichI hereby declare the following to be a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and use the same.'

My invention relates to improvements in grates for furnaces; and theobject of the invention is to provide aform of grate which will permit acentral draft and is easily cleaned and to obtain complete combustion ofthe coal and consequent combustion of the smoke.

My invention consists in a vertically-movably grate portion in which thebars incline outward from a common central support, in connection with alowerannular support, and in the combination and arrangement of partsand construction of details, as hereinafter described, shown in theaccompanying drawings, and specifically pointed out in the claims.

In the accompanying drawings, Figure l is a View of a furnace, a portionof the side being broken away to show the grate in position for use.Fig. 2 is a similar view showing the central portion of the grate raisedto redistribute the coal. Fig. 3 is a vertical sectional view showingthe grate in position. Fig. 4 is a plan view of the main or stationarygrate. Fig. 5 is a detail view of movable grate-bars; and Fig. 6 is aview of a simpler form, in which the lower grate is omitted. Figs. 7 and8 show an additional vibrating cleaning-plate between the grate-bars,and Fig. 9 is a plan of the same.

In these views, l is the main or stationary portion of the grat-e.

2 is the fuel-chamber, which is enlarged at 3 about the edge of thegrate to give free access to clinkers and ashes to the ash-receiver 4below. The bars of the grate 1 are slightly inclined toward this annularspace, so that the ashes and clinkers will naturally gravitate that way.They are supported upon the intermediate ring 5, t-he ring and barsbeing rigidly secured together. Some of the bars,

as 6, extend across the annular space and support the grate upon thewalls of the furnace.

7 represents the movable portion of the' grate, which is shown toconsist of radiallyarranged bars pivotally secured to a common centralsupport 8.- The bars rest upon the ring 5 at their lower extremities',and the support 8 is arranged to move vertically, thus forcing the barsto spread at their lower extremities over the ring as the su'pport'Sdescends and permitting them to come to nearly a vertical position asthe support rises. As shown in the figures, the bars of the verticalportion of the grate may be provided with loops 9, which encircle barsin the horizontal portion and in this manner are kept in close contacttherewith. These loops are not essential, however, to the invention,since the ring will serve to throw out the bars unaided, and the)T willdrop back by means of gravity and thepressure of the coal upon them. Theloops serve also as stops to limit the upward movement of the grate.

The means for raising the central portion is seen distinctly in Fig. 3,where '10 is a lever exterior to the furnace which is employed to rotatethe shaft ll, pivoted in the extension l2 of the ash-pit 4. Upon thisshaft is secured the arm 13, which in turn is pivotally secured to thevertical rod 14, secured to the cone.

The support 8 may be conical in shape, so as to penetrate the coal abovemore readily.

It will be seen that by raising the movable portion of the grate theburning coal can be thrust outward toward the side, and upon lowering itfresh coal will be deposited upon the central portion of the grate. Thedraft being central, the gases and smoke arising from the fresh coalmust pass th rough the incandescent mass of live coal, and hence all theproducts of combustion will be utterly consumed, and a smokeless furnacewill be the result. Again, the motion of the upper bars upon the lowerwill result in pushing all ashes and clinkers off from the outer edge ofthe stationary grate into the ash-pit, and a perfectly clean grate willbe maintained at all times. The consumption of fuel will be so completeand easily accomplished that any kind of fuel, even slack IOO coal, canbe employed, and the movement of the vertical portion will break up anycollection of fuel massed together in the combustion-chamber and preventcaking, splitting it in fragments as the cone is raised.

In Fig. 6 is seen a simpler form in which the lower grate-bars areentirely dispensed with and the movable grate spread to provide theentiregrate-surface. The annular ring 5 alone is preserved in the lowerportion over which the grate-bars move, and a stop, as 20, is employedto prevent greater movement than would be required to merely shake andclean the grate. When, however, it is desired to dump the grate, thestop can be removed and the grate raised to its upward limit ofmovement, thus discharging the entire contents into the ash-pit below.

In Figs. 7, S, and 9 is seen a thin vibrating plate A, which is adaptedto assist in breaking up the mass of coal about the vertical portion ofthe grate when elevated. This plate is pivoted at B to each of themoving grate-bars 7 and by means of the curved tailpiece E, terminatedby a cross-piece Gr, is thrown outward as the movable grate-bar rises,as shown in Fig. 8 in section. It will be seen that the tailpiece Eengages the lower edge of the fixed grate-bar l throughout its lengthand also the projecting point e. A second projection H, terminated by asimilar cross-piece F, engages the top of the fixed grate-bar andassists in returning the vibrating plate to its original position, asseen in Fig. 4. A slot, as I, is formed in the xed grate-bar toaccommodate this vibrating plate.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

l. In a grate, the combination with a stav tionary portion, the bars inwhich are inclined outwardly from a supporting-ring, of a centralVertical portion, comprising bars pivoted to a central support at theirupper extremities and resting at their outerextremities upon said ringin the stationary portion of the grate, and means for raising andlowering said central portion, substantially as set forth.

2. In a grate, the combination with a main stationary portion of acentral vertically-movable portion, the lower extremities of the bars ofthe said vertical portion being pivotedV about a common central supportand constructed and arranged to move outwardly over and between the barsof the lower portion as the central support descends, and to withdrawtogether about the center ofthe grate Y as the central support rises,substantially as described.

3. In a furnace, the combination with a fuel-chamber, provided with anenlargement near its lower extremity, of a fixed graieprovided with barsinclined from the center tof resting upon the ring in combination withVvibrating plates pivotally secured to said pivoted bars and adapted tomove outwardly as said pivoted bars rise toward the vertical position,substantially as described.

Signed by me at Cleveland, Ohio, this 13th Y day of December, A. D.1898.

CHARLES E. WYMAN.

Witnesses:

WM. M. MONROE, C. H. OLDs.

